Scraper for disk openers.



E. R. BEEMAN.

I SCRAPER FOR DISK OPENERS.

APPLICATION IILBD FEB. 16, 1910.

1 975,499. Patented Nbv.15,1910.

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aswm R. BiiEMAN, or MINNEAPOLIS, MINNEsoTA, ASSIGNOR To MONITOR DRILLCOMPANY, A CORPORATION or MINNESOTA.

' SCRAPER FOR DISK OPENERS.

Specification of Letters Patent.

Patented Nov. 15, 1910.

, To all whom it may concern:

Be it known that I, EDWIN R. BnnMAN, of Minneapolis, county of Hennepin,and State of Minnesota, have invented a new and useful Improvement inScrapers for Disk Openers, of which the following is a specification.

This invention relates to a scraper device for use in connection withfurrow opening disks, which scraper device usually consists of twoscraper blades held by spring pressure against the outer faces of thedisks and acting, as the disks are rotated, to dislodge any adheringsoil and keep them clean.

The present invention consists of various improvements in scraperdevices of this general character and is directed more particularly tothe form of the scraper arm holder and the scraper arm, whereby thelatter is permitted to swivel in the holder, is retained against escapetherefrom, and may be conveniently and readily applied to the holder ordetached therefrom by a tipping movement of one of the parts relative tothe other, thereby avoiding the use of separate fastening means.

In the accompanying drawings: Figure 1 is a top plan view of a pair ofdisk openers, the boot on which they are mounted, and my improvedscraper device applied thereto. Fig. 2 is a side elevation of the same.Fig. 3 is a plan view on an enlarged scale of one of the scraper holdersdetached. Fig. 4 is a perspective view of the same,'the dotted linestherein indicating the manner in which the scraper arm is attached to ordetached from the holder.

Referring to the drawings: My improved scraper device comprises a pairof scraper blades 1 and 2, arms 3 and 4 to which the blades areconnected, and scraper arm holders 5 and 6 in which the arms aremounted, the holders being so sustained by a boot or frame 7 that theblades will act on the outer faces of the two disks 8 and 9 journaled onthe boot.

The holders 5 and 6 are elongated in form and provided with longitudinalbearing sockets 5 in which the forward ends of the arms are looselymounted to turn or swivel on a longitudinal axis, and each of theholders is formed with a depending stud 10 mounted loosely in bearingopenings in lugs 11 and 12, projecting laterally from opposite sides ofthe boot, the construction being such that the holders may rock to andfrom the disks, a spring 13 being interposed between the forward ends ofthe holders and acting by its expansion to maintain the bladesyieldingly against the faces of the disks. The scraper arms are somounted in the sockets in the holders that they will be prevented fromescaping endwise therefrom, but will be allowed a limited swiveling orturning movement on a longitudinal axis, and the form of the parts issuch that the arms may be attached to or detached from the holders by atipping movement and without the necessity of employing any separateattaching confining devices, such as cotter pins and the like. Toaccomplish these objects, the socket in the holder is provided withopposing confinin walls 14 and 15 spaced apart longitudinally so as toleave an intervening space 16 between the adjacent ends of the walls,and at the forward end the holder is formed with a slot 17 When the armis in place in the holder, it extends in the socket between the opposingwalls and is provided with a projection 18 on its end, which engages inthe slot, the projection being formed by bending the end of the armlaterally. As a result of this construction, the projection on the armby engaging in the slot prevents the arm from escaping endwise from theholder, and at the same time limits the swiveling motion by engagingrespectively the ends of the slot.

To detach the arm, it is first tipped to the position shown in Fig. 4,which action will withdraw the projection from the slot, whereupon thearm may be lifted through the space between the ends of the walls of thesocket and free of the holder. In attaching the arm, these operationsare reversed, that is, it'is first placed in an inclined position so asto pass into the space between the opposing walls, whereupon it isturned into alinement with the socket, which action will enter theprojection in the slot. In this position, the parts are interlocked andheld together, and by reason of the fact that the blades are heldagainst the disks, the projections on the arms will be maintained in theslots and any accidental tipping, such as would tend to disengage theparts, is prevented. While I have shown the holder as specificallyformed to adapt it to fulcrum on the boot so as to permit of themovement of the blades to and from the disk, it will be understood thatthe .holder may be otherwise mounted, the present invention havingrelation to the manner of interlocking the arm with the holder withoutregard to the mounting of the holder on the boot.

As a result of the construction described, the parts may be produced atlittle cost, the arms are held securely and efiectively in the holders,while at the same time they may be readily attached and detached, andthis without the use of separate fastening devices and the consequentloss of time in effecting the removal of the parts.

WVhile in the accompanying drawings I have shown my invention in theform which I prefer to adopt, and which in practice has been found toanswer to a satisfactory degree the ends to be attained, I wish it to beunderstood that the invention is not limited to any particular detailsexcept in so far as such limitations are specified in the claims.

Having thus described my invention, what I claim is 1. In a diskscraper, the combination with a scraper arm holder provided with abearing socket, of a scraper arm detachably engaged in said socket andadapted to be disengaged by a tipping motion of one of the partsrelatively to the other, and a blade connected with the arm.

2. In a disk scraper, the combination with a scraper arm holder providedwith a bearing socket, of a scraper arm detachably engaged in saidsocket and adapted to be disengaged by a tipping motion of the armremovable sidewise therefrom and having a lateral projection extendingin the slot, whereby the arm will be allowed to swivel but will beprevented from escaping endwise from the socket, and a scraper bladecarried by the arm.

I. In a disk scraper, the combination with a scraper arm holder providedwith an openmg and with a bearing socket having walls adapted to engagethe arm respectively on opposite sides and respectively at difierentpoints in its length, the'said walls being separated longitudinally byan intervening space, a scraper arm seated between the opposing walls ofthe scraper and having a projection extending in the opening in theholder, whereby the arm will be prevented by the projection fromescaping endwise from the holder, but may be disengaged by a tippingmovement to withdraw the projection and enable the arm to pass throughthe space between the walls of the socket, and a scraper blade carriedby the arm.

In testimony whereof I hereunto set my hand this 4th day of February,1910, in the presence of two attesting witnesses.

EDWIN R. BEEMAN. Witnesses:

HORACE L. HAMILTON, A. B. MoINTYnn.

